[Issue 24024] cannot pass class this to ref class

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24024

--- Comment #2 from Walter Bright <bugzilla at digitalmars.com> ---
Looking into the code, the reason the match fails is because `this` for a class
is considered only an rvalue, not an lvalue.

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